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Comparing CV/CV.xs (file contents):
Revision 1.4 by root, Sat Nov 8 18:22:21 2003 UTC vs.
Revision 1.11 by root, Tue Feb 8 10:43:44 2005 UTC

… …
5#include <gdk-pixbuf/gdk-pixbuf.h> 5#include <gdk-pixbuf/gdk-pixbuf.h>
6 6
7#include <gperl.h> 7#include <gperl.h>
8#include <gtk2perl.h> 8#include <gtk2perl.h>
9 9
10#define IW 80
11
12#define RAND (seed = (seed + 7141) * 54773 % 134456)
13
14#define LINELENGTH 240
15
16#define ELLIPSIS "\xe2\x80\xa6"
17
10static guint32 a85_val; 18static guint32 a85_val;
11static guint a85_cnt; 19static guint a85_cnt;
12static guchar a85_buf[80], *a85_ptr; 20static guchar a85_buf[LINELENGTH], *a85_ptr;
13 21
14static void 22static void
15a85_init (void) 23a85_init (void)
16{ 24{
17 a85_cnt = 4; 25 a85_cnt = 4;
… …
47 } 55 }
48 } 56 }
49 57
50} 58}
51 59
60static void
52a85_finish (PerlIO *fp) 61a85_finish (PerlIO *fp)
53{ 62{
54 while (a85_cnt != 4) 63 while (a85_cnt != 4)
55 a85_push (fp, 0); 64 a85_push (fp, 0);
56 65
… …
59 *a85_ptr++ = '\n'; 68 *a85_ptr++ = '\n';
60 69
61 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); 70 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
62} 71}
63 72
73static void
74rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
75 unsigned int *h, unsigned int *s, unsigned int *v)
76{
77 unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
78 unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
79 unsigned int delta = mx - mn;
80
81 *v = mx;
82
83 *s = mx ? delta * 255 / mx : 0;
84
85 if (delta == 0)
86 *h = 0;
87 else
88 {
89 if (r == mx)
90 *h = ((int)g - (int)b) * 255 / (int)(delta * 3);
91 else if (g == mx)
92 *h = ((int)b - (int)r) * 255 / (int)(delta * 3) + 52;
93 else if (b == mx)
94 *h = ((int)r - (int)g) * 255 / (int)(delta * 3) + 103;
95
96 *h &= 255;
97 }
98}
99
100/////////////////////////////////////////////////////////////////////////////
101
64MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow 102MODULE = Gtk2::CV PACKAGE = Gtk2::CV
65 103
66PROTOTYPES: ENABLE 104PROTOTYPES: ENABLE
67 105
68GdkPixbuf_noinc * 106GdkPixbuf_noinc *
69transpose (GdkPixbuf *pb) 107transpose (GdkPixbuf *pb)
70 CODE: 108 CODE:
71{ 109{
72 int w = gdk_pixbuf_get_width (pb); 110 int w = gdk_pixbuf_get_width (pb);
73 int h = gdk_pixbuf_get_height (pb); 111 int h = gdk_pixbuf_get_height (pb);
74 int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; 112 int bpp = gdk_pixbuf_get_n_channels (pb);
75 int x, y, i; 113 int x, y, i;
76 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 114 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
77 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 115 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
78 116
79 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); 117 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);
… …
93flop (GdkPixbuf *pb) 131flop (GdkPixbuf *pb)
94 CODE: 132 CODE:
95{ 133{
96 int w = gdk_pixbuf_get_width (pb); 134 int w = gdk_pixbuf_get_width (pb);
97 int h = gdk_pixbuf_get_height (pb); 135 int h = gdk_pixbuf_get_height (pb);
98 int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; 136 int bpp = gdk_pixbuf_get_n_channels (pb);
99 int x, y, i; 137 int x, y, i;
100 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 138 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
101 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 139 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
102 140
103 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h); 141 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);
… …
110 for (i = 0; i < bpp; i++) 148 for (i = 0; i < bpp; i++)
111 dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i]; 149 dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
112} 150}
113 OUTPUT: 151 OUTPUT:
114 RETVAL 152 RETVAL
153
154#############################################################################
115 155
116MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer 156MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
117 157
118GdkPixbuf_noinc * 158GdkPixbuf_noinc *
119p7_to_pb (int w, int h, guchar *src) 159p7_to_pb (int w, int h, guchar *src)
… …
146{ 186{
147 int w = gdk_pixbuf_get_width (pb); 187 int w = gdk_pixbuf_get_width (pb);
148 int h = gdk_pixbuf_get_height (pb); 188 int h = gdk_pixbuf_get_height (pb);
149 int x, y; 189 int x, y;
150 guchar *dst; 190 guchar *dst;
151 int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; 191 int bpp = gdk_pixbuf_get_n_channels (pb);
152 guchar *src = gdk_pixbuf_get_pixels (pb); 192 guchar *src = gdk_pixbuf_get_pixels (pb);
153 int sstr = gdk_pixbuf_get_rowstride (pb); 193 int sstr = gdk_pixbuf_get_rowstride (pb);
194 int Er[IW], Eg[IW], Eb[IW];
195 int seed = 77;
154 196
155 RETVAL = newSV (w * h); 197 RETVAL = newSV (w * h);
156 SvPOK_only (RETVAL); 198 SvPOK_only (RETVAL);
157 SvCUR_set (RETVAL, w * h); 199 SvCUR_set (RETVAL, w * h);
158 200
159 dst = SvPVX (RETVAL); 201 dst = SvPVX (RETVAL);
160 202
203 memset (Er, 0, sizeof (int) * IW);
204 memset (Eg, 0, sizeof (int) * IW);
205 memset (Eb, 0, sizeof (int) * IW);
206
207 /* some primitive error distribution + random dithering */
208
161 for (y = 0; y < h; y++) 209 for (y = 0; y < h; y++)
162 { 210 {
163 /* use a very primitive form of error distribution. */
164 int er = 0, eg = 0, eb = 0; 211 int er = 0, eg = 0, eb = 0;
165 212
166 for (x = 0; x < w; x++) 213 for (x = 0; x < w; x++)
167 { 214 {
168 int r, g, b; 215 int r, g, b;
169 guchar *p = src + x * bpp + y * sstr; 216 guchar *p = src + x * bpp + y * sstr;
170 217
171 r = ((p[0] + er) * 7 + 128) / 255; 218 r = ((p[0] + er + Er[x]) * 7 + 128) / 255;
172 g = ((p[1] + eg) * 7 + 128) / 255; 219 g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255;
173 b = ((p[2] + eb) * 3 + 128) / 255; 220 b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255;
174 221
175 r = r > 7 ? 7 : r < 0 ? 0 : r; 222 r = r > 7 ? 7 : r < 0 ? 0 : r;
176 g = g > 7 ? 7 : g < 0 ? 0 : g; 223 g = g > 7 ? 7 : g < 0 ? 0 : g;
177 b = b > 3 ? 3 : b < 0 ? 0 : b; 224 b = b > 3 ? 3 : b < 0 ? 0 : b;
178 225
179 er += p[0] - (r * 255 + 4) / 7; 226 er += p[0] - (r * 255 + 4) / 7;
180 eg += p[1] - (g * 255 + 4) / 7; 227 eg += p[1] - (g * 255 + 4) / 7;
181 eb += p[2] - (b * 255 + 2) / 3; 228 eb += p[2] - (b * 255 + 2) / 3;
182 229
230 Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3;
231 Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3;
232 Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3;
233
183 *dst++ = r << 5 | g << 2 | b; 234 *dst++ = r << 5 | g << 2 | b;
184 } 235 }
185 } 236 }
186} 237}
187 OUTPUT: 238 OUTPUT:
188 RETVAL 239 RETVAL
189 240
241SV *
242make_histogram (SV *ar)
243 CODE:
244{
245 int i;
246 AV *av, *result;
247
248 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
249 croak ("Not an array ref as first argument to make_histogram");
250
251 av = (AV *) SvRV (ar);
252 result = newAV ();
253
254 for (i = 0; i <= av_len (av); ++i)
255 {
256 int bigst, j;
257 SV *sv = *av_fetch (av, i, 1);
258 STRLEN len;
259 char *buf = SvPVbyte (sv, len);
260
261 int tmphist[256];
262 char *hist;
263
264 SV *histsv = newSV (257);
265 sv_upgrade (histsv, SVt_PV);
266 SvCUR_set (histsv, 256);
267 hist = SvPV_nolen (histsv);
268
269 Zero (tmphist, 256, int);
270
271 while (len--)
272 ++tmphist[(unsigned char)*buf++];
273
274 bigst = 1;
275 for (j = 0; j < 256; ++j)
276 if (tmphist[j] > bigst)
277 bigst = tmphist[j];
278
279 for (j = 0; j < 256; ++j)
280 hist[j] = tmphist[j] * 255 / bigst;
281
282 av_push (result, histsv);
283 }
284
285 RETVAL = newRV_noinc ((SV *)result);
286}
287 OUTPUT:
288 RETVAL
289
290
291
292#############################################################################
293
190MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript 294MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
191 295
192void 296void
193dump_pb (PerlIO *fp, GdkPixbuf *pb) 297dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
194 CODE: 298 CODE:
195{ 299{
196 int w = gdk_pixbuf_get_width (pb); 300 int w = gdk_pixbuf_get_width (pb);
197 int h = gdk_pixbuf_get_height (pb); 301 int h = gdk_pixbuf_get_height (pb);
198 int x, y, i; 302 int x, y, i;
199 guchar *dst; 303 guchar *dst;
200 int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; 304 int bpp = gdk_pixbuf_get_n_channels (pb);
201 guchar *src = gdk_pixbuf_get_pixels (pb); 305 guchar *src = gdk_pixbuf_get_pixels (pb);
202 int sstr = gdk_pixbuf_get_rowstride (pb); 306 int sstr = gdk_pixbuf_get_rowstride (pb);
203 307
204 a85_init (); 308 a85_init ();
205 309
206 for (y = 0; y < h; y++) 310 for (y = 0; y < h; y++)
207 for (x = 0; x < w; x++) 311 for (x = 0; x < w; x++)
208 for (i = 0; i < 3; i++) 312 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
209 a85_push (fp, src [x * bpp + y * sstr + i]); 313 a85_push (fp, src [x * bpp + y * sstr + i]);
210 314
211 a85_finish (fp); 315 a85_finish (fp);
212} 316}
213 317
318void
319dump_binary (PerlIO *fp, GdkPixbuf *pb)
320 CODE:
321{
322 int w = gdk_pixbuf_get_width (pb);
323 int h = gdk_pixbuf_get_height (pb);
324 int x, y, i;
325 guchar *dst;
326 int bpp = gdk_pixbuf_get_n_channels (pb);
327 guchar *src = gdk_pixbuf_get_pixels (pb);
328 int sstr = gdk_pixbuf_get_rowstride (pb);
214 329
330 for (y = 0; y < h; y++)
331 for (x = 0; x < w; x++)
332 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
333 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
334}
215 335
336#############################################################################
216 337
338MODULE = Gtk2::CV PACKAGE = Gtk2::CV
339
340SV *
341pb_to_hv84 (GdkPixbuf *pb)
342 CODE:
343{
344 int w = gdk_pixbuf_get_width (pb);
345 int h = gdk_pixbuf_get_height (pb);
346 int x, y;
347 guchar *dst;
348 int bpp = gdk_pixbuf_get_n_channels (pb);
349 guchar *src = gdk_pixbuf_get_pixels (pb);
350 int sstr = gdk_pixbuf_get_rowstride (pb);
351
352 RETVAL = newSV (6 * 8 * 12 / 8);
353 SvPOK_only (RETVAL);
354 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
355
356 dst = SvPVX (RETVAL);
357
358 /* some primitive error distribution + random dithering */
359
360 for (y = 0; y < h; y++)
361 {
362 guchar *p = src + y * sstr;
363
364 for (x = 0; x < w; x += 2)
365 {
366 unsigned int r, g, b, h, s, v, H, V1, V2;
367
368 if (bpp == 3)
369 r = *p++, g = *p++, b = *p++;
370 else if (bpp == 1)
371 r = g = b = *p++;
372 else
373 abort ();
374
375 rgb_to_hsv (r, g, b, &h, &s, &v);
376
377 H = (h * 15 / 255) << 4;
378 V1 = v;
379
380 if (bpp == 3)
381 r = *p++, g = *p++, b = *p++;
382 else if (bpp == 1)
383 r = g = b = *p++;
384 else
385 abort ();
386
387 rgb_to_hsv (r, g, b, &h, &s, &v);
388
389 H |= h * 15 / 255;
390 V2 = v;
391
392 *dst++ = H;
393 *dst++ = V1;
394 *dst++ = V2;
395 }
396 }
397}
398 OUTPUT:
399 RETVAL
400
401SV *
402hv84_to_av (unsigned char *hv84)
403 CODE:
404{
405 int i = 72 / 3;
406 AV *av = newAV ();
407
408 RETVAL = (SV *)newRV_noinc ((SV *)av);
409 while (i--)
410 {
411 int h = *hv84++;
412 int v1 = *hv84++;
413 int v2 = *hv84++;
414
415 av_push (av, newSViv (v1));
416 av_push (av, newSViv ((h >> 4) * 255 / 15));
417 av_push (av, newSViv (v2));
418 av_push (av, newSViv ((h & 15) * 255 / 15));
419 }
420}
421 OUTPUT:
422 RETVAL
423
424
425

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